Hi people, I have a mirage asti rs ( year 2000) I bought a fuel pressure regulator and I wanna set up for drags, how many psi are the corrects, 55 psi or 60 psi, I dont any mods in my engine but in the future I wanna chane the throttle in 63mm
pliz I need help

Hi people, I have a mirage asti rs ( year 2000) I bought a fuel pressure regulator and I wanna set up for drags, how many psi are the corrects, 55 psi or 60 psi, I dont any mods in my engine but in the future I wanna chane the throttle in 63mmpliz I need help

We're talking about a setup for the drags Rabbit. I'm not saying i'd run 5 bar plus all day every day.

Atom, we kept upping the fuel pressure and it kept going faster, so basically just maxed out the fuel reg short of going onto internal relief on the fuel pump.

I'm a little lost. Why on earth would you want to change your fuel pressure at all? Slicks, suspension and tyre pressure sure, but fuel pressure?!?! Surely your tuning (stock or modified) will be set to a specific fuel pressure?

Never mind the fact that increasing fuel pressure increases injector dead time and may even give poor fuel atomisation at ridiculous pressures.

I running a stock reg on a gen1 and don't have any problems (nice steady pressure), what goes wrong with a gen1 reg Boof? (will need an good excuse to replace it)

People tend to up the fuel pressure to compensate for mods as a cheap'n'nasty way of increasing fueling (across the map) rather than getting their ECUs remapped. Rising rate regualators of course can increase fueling at WOT while mainting stock pressure at cruise. Although for the cost of a good rising rate reg you can almost get a remap done. Good rising rate being one where the rate as well the pressure is adjustable.

If you have a aftermarket ECU or piggyback there is no reason I can see to increase fuel pressure to anything beyond spec and any reg that maintains a good steady presure (compensation only for manifold pressure at 1:1 rate) should be fine.

As long as your running a stock ECU (even gizzmo chipped was fine) you probably won't have any problems, but it doesn't have much capacity in reserve. I doubt it would cope with an increase in pressure (I've never tested its actual flow with an increased pressure)

I actually found the problem of fuel surge with the crappy gen1 tank to be much more of problem than the fuel pump, but when I changed to a EVO tank I changed the pump at the same time. The EVO pump would have been fine, but my tank didn't come with one.

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